CN1247734C - Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field - Google Patents
Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field Download PDFInfo
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- CN1247734C CN1247734C CN02146452.9A CN02146452A CN1247734C CN 1247734 C CN1247734 C CN 1247734C CN 02146452 A CN02146452 A CN 02146452A CN 1247734 C CN1247734 C CN 1247734C
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- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 14
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 14
- 230000000903 blocking effect Effects 0.000 title abstract 9
- 239000000654 additive Substances 0.000 claims abstract description 35
- 230000000996 additive effect Effects 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 239000000243 solution Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 10
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims abstract description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 5
- 150000002978 peroxides Chemical class 0.000 claims description 26
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 2
- 101710194948 Protein phosphatase PhpP Proteins 0.000 claims description 2
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 229960002218 sodium chlorite Drugs 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004880 explosion Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 32
- 239000002253 acid Substances 0.000 description 6
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 2
- 241000219782 Sesbania Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical compound [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 150000007520 diprotic acids Chemical class 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 150000007518 monoprotic acids Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 150000007521 triprotic acids Chemical class 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/02—Oxides of chlorine
- C01B11/022—Chlorine dioxide (ClO2)
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S166/00—Wells
- Y10S166/902—Wells for inhibiting corrosion or coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/927—Well cleaning fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/927—Well cleaning fluid
- Y10S507/929—Cleaning organic contaminant
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention relates to a synthesis chlorine dioxide blocking remover under a well of an oil field, and a blocking removing method thereof. The present invention is characterized in that a solution mainly using sodium chlorite in a main agent dissolution tank, and a solution mainly using phosphoric acid in an additive tank are rapidly injected under oil and water wells by injection pumps, the solutions react under the oil and water wells to generate chlorine dioxide. Blocking to an oil layer due to various high molecular polymers, microbes, etc. can be effectively removed. The danger of explosion generated by the escape of chlorine dioxide gas, and damage to a human body can be avoided; meanwhile, the blocking remover has the function of lowering the corrosion of the chlorine dioxide to equipment and pipelines. The blocking remover is suitable for the blocking removing of measure wells of oil and water wells, fracturing wells, water blocking profile modification wells, etc., and the blocking removing of tertiary oil recovery injection and collection wells and recovery wells. The yield of oil wells can be increased, and the injection of water wells can be increased. Oil recovery cost is lowered, and an oil recovery rate is enhanced.
Description
The present invention relates to a kind of by host and additive in the down-hole, oil field synthetic dioxide peroxide unblocking agent and method for removing blockage thereof, belong to petrochemical industry.
Oil recovery industry is a multidisciplinary complicated system engineering, keeps the unimpeded of water injection well and oil well, and water is constantly injected, and crude oil is constantly come out by displacement, is the key link of petroleum production engineering.But oil, well is usually blocked.Tamper roughly has four kinds: the one, and inorganic salt (carbonate, silicate etc.); The 2nd, biological cenobium; The 3rd, microbial cells also can cause the corrosion of steel, generates Iron sulfuret and enter oil reservoir to produce obstruction; The 4th, in construction processs such as drilling well, kill-job, well workover, pressure break and water plugging and profile controlling, and tertiary oil recovery polymer flooding etc. all will use all kinds of high molecular polymers in a large number, all can cause damage to stratum permeability in varying degrees, forms and stops up.
At present, generally the acid solution of using in the acidification to dispel block technology of Cai Yonging has in various degree corrosion ability to stratum mineral and conventional inorganic tamper, can remove the perviousness infringement that most inorganicss cause the stratum.But to polymer plugging, it is biological that to stop up plugging removal effect very poor, even do not work.
According to relevant document introduction, countries such as the U.S. are in late nineteen eighties is about to de-plugging exploitation that the dioxide peroxide technology is applied to the oil field, and volume increase, augmented injection effect are remarkable.China is also in the nineties, many oil fields and research institutions have all dropped into a large amount of human and material resources and have studied, but, all the danger of blast is arranged because chlorine dioxide is overflowed, human body is easily damaged, the strong oxidation of dioxide peroxide is difficult to solve to the equipment in oil field and corrosive pipeline problem in addition, so fail to enter rig-site utilization in China always.
The objective of the invention is to overcome the deficiency and the defective of above-mentioned prior art, dioxide peroxide is generated gradually in the down-hole by the technical parameter of setting by specific method and prescription.Thereby utilize the strong oxidizing property energy of dioxide peroxide, make high molecular polymer oxygenolysis such as polyacrylamide, sesbania gum, guanidine glue, viscosity degradation, flowability improves and is easy to discharge; Can also kill various biomasses rapidly, reach the purpose of oil, well de-plugging.
When the unblocking agent host aqueous solution and additive solution were injected into the down-hole simultaneously, the method according to the dioxide peroxide of the synthetic enough concentration of the quantity of setting can not produce gas evolution, can not damage or blasted human body, used simple, safe and reliable; Because of the dioxide peroxide of its generation has controllability, within a certain period of time, constantly discharge dioxide peroxide, improved plug removal radius, greatly reduce dioxide peroxide to equipment and Corrosion of Pipeline.
Synthetic dioxide peroxide unblocking agent in down-hole, oil field of the present invention and method for removing blockage thereof are to realize like this.
The first step: host is to be main raw material with sodium chlorite, also can adopt stability chlorine dioxide (comprising liquid and solid-state) or sodium chlorate.Be equipped with auxiliary material expansion-resisting agent such as Repone K, ammonia chloride etc. are arranged; Inhibiter such as tertiary sodium phosphate, sodium hydroxide, tripoly phosphate sodium STPP etc.Product is white or little bloom shape.
Second step: additive is based on phosphoric acid, also monoprotic acid such as hydrochloric acid, hydrofluoric acid, thionamic acid, formic acid; Also can be diprotic acid such as sulfuric acid, tartrate, oxalic acid; Also can be triprotic acids such as citric acid; And in solution, can produce hydrogen ion (H
+) the acid salt.Auxiliary material has acetic acid, sodium bicarbonate, nonionogenic tenside etc., uses water dissolution.
The 3rd step: method for removing blockage will be the host of main raw material with Textone or sodium chlorate or stability chlorine dioxide, add in the host dissolving vessel, generate the size of chlorine dioxide concentration according to the down-hole of setting, and water fully dissolves in proportion, and is standby; To be that the additive solution of main raw material is added in the additive tank with phosphoric acid or citric acid, standby; Start high head injection pump and additive solution pump during the de-plugging operation, water-line by high head injection pump is with solution in the host dissolving vessel of parallel connection and the additive in the additive tank, after entering the injection pump pressurization in proportion fast, water outlet pipeline by high head injection pump injects oil (water) well down-hole, make host and additive chemical reaction take place, progressively generate the dioxide peroxide unblocking agent in the down-hole.Thereby utilize the strong oxidizing property energy of dioxide peroxide, make various high molecular polymer oxygenolysis such as polyacrylamide, sesbania gum, guanidine glue, viscosity degradation, flowability improves, and is easy to discharge; Simultaneously, dioxide peroxide can also kill fast sulphate reducing bacteria, saprophytic microorganism, microbial cells such as iron bacteria, remove polymkeric substance and the biological purpose of stopping up thereby reach.
Described host solution and additive solution are mixed in proportion, and mixing can comprise the ingress of water-line at any position of high head injection pump water-line.
The main chemical reactions equation of host and additive is:
Sodium chlorite's content is according to the content that is set in the required dioxide peroxide in down-hole in the host, and above-mentioned (1) (2) reaction equation calculating decision.
Phosphorus acid content is the content according to sodium chlorite in the host in the additive, and above-mentioned (1) (2) reaction equation calculating decision.
The concentration that generates dioxide peroxide in the down-hole is to be determined by the oil field on-the site analysis according to the degree of the difference of polymkeric substance and microorganism obstruction.
During every mouthful of well operations, the unblocking agent total amount of required injection should be calculated according to following formula
W
Total amount=π R
2RH
The required unblocking agent solution of W---total amount
The R---plug removal radius
The H---core intersection
R---oil reservoir porosity
Unblocking agent generates aqueous solution of chlorine dioxide in the down-hole concentration is controlled at 200mg/L to 5000mg/L.
The concentration of dioxide peroxide is too low can to influence plugging removal effect, and concentration is too high can to influence construction safety.
Operational flowchart below in conjunction with synthetic dioxide peroxide unblocking agent in down-hole, oil field and method for removing blockage thereof comes further to be proved.(seeing accompanying drawing)
Among the figure: 1. host dissolving vessel 2. additive tanks 3. high head injection pumps
4. high head injection pump water-line 5. high head injection pump water outlet pipelines
6. oily (water) well 7. additive solution pumps 8. additive flow meters
The concrete operations of synthetic dioxide peroxide unblocking agent in down-hole, oil field and method for removing blockage thereof are as follows:
The first step: host is added in the host dissolving vessel 1 according to the Site Design consumption, after adding water in proportion and fully dissolving, standby.
Second step: additive is poured in the additive tank 2 by design quantity, standby.
The 3rd step: will be connected to high head injection pump water-line 4 after host dissolving vessel 1 and the additive tank 2 usefulness pipeline parallel connections.
The 4th step:, be connected to oil (water) well 6 with the high head injection pump water outlet pipeline 5 of high head injection pump 3.
The 5th step: start high head injection pump 3 and additive solution pump 7 simultaneously, additive in the additive tank 2 of host solution in the host dissolving vessel 1 and 8 controls of process additive flow meter is mixed into high head injection pump water-line 4, after high head injection pump 3 pressurizations, by high head injection pump water outlet pipeline 5, inject oil (water) well 6.
The 6th step: after unblocking agent all injects the down-hole by the total consumption of design, with displacing liquid the unblocking agent solution in the pit shaft is all clamp-oned oil reservoir again.Closing well, unblocking agent reacts de-plugging in the down-hole, and de-plugging operation is so far all finished, and hands over oil recovery factory's management.
Conventional oil (water) well closing well was all instead arranged in 24 hours, can drop into normal use behind the anti-row.Anti-row is oil recovery factory's oil recovery worker's a task.
Because the synthetic of dioxide peroxide mainly finished in the down-hole, so can avoid chlorine dioxide to overflow human body is damaged, and produce the danger of blast.Simultaneously also alleviated the strong oxidizer dioxide peroxide, can reach erosion rate＜15mg/m fully oil field equipment and Corrosion of Pipeline
2The requirement of h.
Embodiment: Shengli Oil Field F26---6 low permeability oil well, acidification to dispel block invalid (not fuel-displaced) several times after the obstruction, closing well reaches 1 year 04 months.The oil field field engineer think, though tamper has the part inorganic salts, mainly is that polyacrylamide and the biological cenobium at near-well-bore area causes.So decision is adopted synthetic dioxide peroxide unblocking agent in the down-hole, oil field of the present invention's research and method for removing blockage thereof promptly: HRS unblocking agent and method for removing blockage thereof, combine with the conventional acidifying in oil field, segmentation is beaten and is annotated the plug de-plugging.With mud acid degraded inorganic salt tamper, stop up with HRS unblocking agent degradation polymer.On the basis of the indoor evaluation in oil field, on-the site analysis thinks that the concentration of HRS unblocking agent synthetic dioxide peroxide in the down-hole should be 1000mg/L---1200mg/L.Calculated the content of Textone in the HRS unblocking agent host solution by the concentration of dioxide peroxide according to reactional equation (1) and (2), and the content of phosphoric acid in the corresponding with it additive.
The oil production engineer is according to thickness, porosity, plug removal radius and the calculation formula of oil reservoir, and the de-plugging of affirmation F26---6 well need be used mud acid 15m
3, HRS unblocking agent solution 15m
3HRS solution is joined 1m by its host (white powdery) with 30kg
3, form with water dissolution.Additive is then pressed 1m
3Host solution adds the 20kg additive, together enters the down-hole with host solution equably continuously by the control of additive flow meter.
On July 10th, 1999, adopt the method for removing blockage of the present invention's research, the F26---6 well is implemented the de-plugging operation after, the production fluid amount rises to 4.5 tons of initial stage daily outputs by fluid not, accumulative total increases oil and reaches 1011 tons in 1 year.Plugging removal effect is seen attached list.
Claims (2)
1. method for removing blockage that utilizes the dioxide peroxide unblocking agent to the oil field well is characterized in that:
The first step: will be the host of main raw material with Textone or sodium chlorate or stability chlorine dioxide, be equipped with auxiliary material expansion-resisting agent Repone K or ammonia chloride are arranged, inhibiter tertiary sodium phosphate or sodium hydroxide or tripoly phosphate sodium STPP, add in the host dissolving vessel (1), generate the size of chlorine dioxide concentration according to the down-hole of setting, water fully dissolves in proportion, and is standby;
Second step: will be that the additive solution of main raw material is added in the additive tank (2) with phosphoric acid or citric acid, standby;
The 3rd step: start high head injection pump (3) and additive solution pump (7), by the water-line (4) of high head injection pump solution and the interior additive of additive tank (2) that the host dissolving vessel (1) of parallel connection is interior, after entering injection pump (3) pressurization in proportion fast, water outlet pipeline (5) by high head injection pump (3) injects oil (water) well (6) down-hole, make host and additive chemical reaction take place, progressively generate the dioxide peroxide unblocking agent in the down-hole;
The main chemical reactions equation of host and additive is:
Described unblocking agent generates aqueous solution of chlorine dioxide in the down-hole concentration is controlled between the 200mg/L to 5000mg/L.
2. the method for removing blockage of oil field according to claim 1 well is characterized in that described host solution and additive solution are mixed in proportion, and mixing can comprise the ingress of water-line at any position of high head injection pump water-line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02146452.9A CN1247734C (en) | 2002-11-08 | 2002-11-08 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
| US10/705,421 US7131495B2 (en) | 2002-11-08 | 2003-11-10 | Method for preparing a chlorine dioxide block-removing agent in oil wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02146452.9A CN1247734C (en) | 2002-11-08 | 2002-11-08 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1435464A CN1435464A (en) | 2003-08-13 |
| CN1247734C true CN1247734C (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02146452.9A Expired - Fee Related CN1247734C (en) | 2002-11-08 | 2002-11-08 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US7131495B2 (en) |
| CN (1) | CN1247734C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396777A (en) * | 2013-07-22 | 2013-11-20 | 郝占元 | Application of chlorine dioxide blocking remover in coal bed modification |
| CN110937669A (en) * | 2018-09-25 | 2020-03-31 | 中国石油天然气股份有限公司 | Treating agent and method for treating fracturing flowback fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103396777A (en) * | 2013-07-22 | 2013-11-20 | 郝占元 | Application of chlorine dioxide blocking remover in coal bed modification |
| CN110937669A (en) * | 2018-09-25 | 2020-03-31 | 中国石油天然气股份有限公司 | Treating agent and method for treating fracturing flowback fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| US7131495B2 (en) | 2006-11-07 |
| US20040224855A1 (en) | 2004-11-11 |
| CN1435464A (en) | 2003-08-13 |
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